Sagot :
bonsoir
A= (5x+3)(4x+7)
A = 20 x² + 35 x + 12 x + 21
A = 20 x² + 47 x + 21
B = (2x + 1)(3x 5)
B = 6 x² + 10 x + 3 x + 5
B = 6 x² + 13 x + 5
C.= (7x-3)(4x-5)
C = 28 x² - 35 x - 12 x + 15
C = 28 x² - 47x + 15
bonsoir
A= (5x+3)(4x+7)
A = 20 x² + 35 x + 12 x + 21
A = 20 x² + 47 x + 21
B = (2x + 1)(3x 5)
B = 6 x² + 10 x + 3 x + 5
B = 6 x² + 13 x + 5
C.= (7x-3)(4x-5)
C = 28 x² - 35 x - 12 x + 15
C = 28 x² - 47x + 15